I am not sure for solo, unless you mean a private unomp.

I would guess they are more or less the same. I just make a private pool,  so use rpcuser/rpcpassword


rpcuser=Lycaon-pictusrpc
rpcpassword=Thelongpasswordyouget
rpcallowip=127.0.0.1
daemon=1
server=1
rpcport=4854
gen=0
staking=0


If solo from your desktop, the same as above applies if you set up a daemon as your wallet (strike out gen=0 and staking=0)

Otherwise, assuming you use a wallet, I would guess:

username=Whateveryouchoose
password=Whateveryouchoose
rpcallowip=127.0.0.1
daemon=1
rpcport=4854

You do not need much in the .conf, just the minimum.

Typically, depending  on the miner you use, your script would have something like:

./minerd -a x11 -o http://127.0.0.1:4854 -u usernameorrpcusername -p yourrrpcpasswordorwalletpassword